Hydraulic cylinder high-temperature reciprocating test device and method

The invention provides a hydraulic cylinder high-temperature reciprocating test device. The device comprises a to-be-tested hydraulic cylinder arranged in a high-temperature environment and a workinghydraulic station equipped with normal-temperature hydraulic oil, wherein the working hydraulic station is connected with the to-be-tested hydraulic cylinder through an isolating conduction oil path capable of heating the hydraulic oil to a constant high temperature and controls a piston rod of the to-be-tested hydraulic cylinder to reciprocate, and an oil guide path communicating between the isolating conduction oil path and the working hydraulic station and an oil guide path communicating between the isolating conduction oil path and the to-be-tested hydraulic cylinder are sealed and isolated and can be mutually pushed to transmit oil pressure power. According to the device, the path of the high-temperature hydraulic oil entering and exiting the to-be-tested hydraulic cylinder can be effectively shortened, the t