Gravity assisted heat pipe mixing working medium

The invention provides a gravity assisted heat pipe mixing working medium. The mixing working medium contains HC600a and HFC245fa, as well as HFO1234ze or HFO1234yf, and can also contain HFC32 or HFC152a. The working medium has good thermal stability, safety and non toxicity, and meets the requirement of environmental protection, wherein ODP is 0, and GWP is low. The mixing working medium has moderate saturated vapor pressure, proper heat transfer performance, high M' criteria number for reflecting thermal physics and heat transfer comprehensive performance at the working temperature of 0 DEG C to 100 DEG C, and has good heat transfer properties and transport properties.