Abstract: The adjustment and controling of turtle breeding greenhouse need a large amount of fossil energy,so a turtle breeding greenhouse with 30 m2 cultivation area was selected as the research object, the heating load of greenhouse is calculated,and the heating system of parallel solar-assisted heat pump （SAHP） was designed with better optimization,and calculated and selected the key components of SAHP, which test bench was installed in accordance with the design scheme. This SAHP has flexible running mode and is able to use solar energy as much as possible,which could provide reference for the design and application of the similar equipments.