Pitching starting type multi-head hydraulic oscillator

The invention belongs to the technical field of hydraulic oscillators, and particularly relates to a pitching starting type multi-head hydraulic oscillator. Comprising a lower flexible joint, a control valve shell, an adjusting sleeve, a fixed valve, a wear-resistant alloy sleeve, a movable valve, a movable valve seat, a lower flexible shaft joint, a universal shaft shell, a flexible shaft, a pin, an upper flexible shaft joint, a multi-head stator, a hollow multi-head rotor, a soluble composite fracturing ball and an upper flexible joint. Hydraulic oscillation ball throwing is started according to needs, and a well section where the hydraulic oscillator needs to work can be freely started. The hydraulic oscillator is switched on and off according to on-demand pitching, transmission of bit pressure is improved in well section drilling with large friction resistance, sticking and clamping of a drilling tool assembly are reduced, and the directional drilling efficiency is improved; and in a well section with sma