To buy the perfect fermentation compost turning machine, you can consider the following steps:

1. Determine the needs: First of all, determine the needs of your organic fertilizer production line, including the amount of waste that needs to be processed every day, the budget, the use of the site, etc. This will help you to choose the right size and performance of the fermentation tiller.

2. Research the market: on the Internet or field visits, understand what brands and models of organic fertilizer equipment are on the market, their prices, performance characteristics, after-sales service and other information.

3. Choose reliable brands: Choose some well-known, reputable brands, they usually provide more reliable product quality and after-sales service, to avoid buying poor quality products.

4. Compare product parameters: Compare the parameters of different brands and models of fermentation turning machines, such as processing capacity, power, energy consumption, ease of operation, etc., to choose the product that best meets your needs.

5. Inspect after-sales service: Understand the after-sales service commitment of manufacturers or sellers, including warranty period, after-sales service response time, spare parts supply, etc., to ensure that timely technical support and maintenance services can be obtained during use.

6. Field inspection and trial: If conditions permit, it is best to visit the manufacturer's production base or exhibition hall, personally try the product, understand its performance and operation process, to ensure that the purchased product meets your expectations.

7. Price negotiation and contract signing: After confirming the selection, negotiate the price with the manufacturer or dealer, and sign the purchase and sales contract to clarify the product model, quantity, price, delivery time, after-sales service and other terms to ensure the rights and interests of both parties.