The invention discloses a system for testing mechanical characteristics of complete fully-mechanized coal mining equipment of a cylinder coal mining machine and fundamentally solves the problem that existing cylinder coal mining machines are large in mechanical characteristic detection error, few in detection parameter amount and incapable of applying detection results to actual product. The system comprises a coal mining machine data collection platform, a simulated coal wall data collection platform, a scraper conveyor data collection platform which are connected with a data collection terminal respectively. The system is characterized in that the coal mining machine data collection platform comprises a cutting tooth stress detection system, a cylinder rotating speed detection system, a coal mining machine vibration detection system, a flat sliding shoe stress detection system, a guide sliding shoe stress detection system, a coal mining machine hydraulic pull rod stress detection system and a cylinder torque detection system, and the scraper conveyor data collection platform comprises a scraper conveyor voltage/current/power detection system, a scraper conveyor vibration detection system, a scraper conveyor middle groove stress detection system, a scraper conveyor dumbbell stress detection system and a scraper conveyor positioning detection system.