The present invention discloses an automatic molding machine for producing pulp moulded products at a super small draft angle, being configured as such that when an overturn means is performing the action of overturning, a centralizing gear of a centralizing means supportively assists in the ascending or descending synchronous movements along a centralizing rack on a centralizing shaft rod so as to enable all shafts to ascend or descend to a defined position in a synchronous and parallel manner, when a pulp absorbing die is conducting up and down movement or overturning movement, due to the supportive assistance between the centralizing gear and the centralizing rack, which will facilitate the realization of a complete and correct die locking as the pulp absorbing die is driven ascended for die locking with an extrusion die, or is driven descended for die locking with a moving die. At the same time, the extrusion die has a descending stroke controlled by a power cylinder body so as to conduct die locking with the ascending pulp absorbing die, which will reduce the move stroke of the pulp die, reduce manufacturing man-hour and manpower, decrease manufacturing cost, and improve qualification rate and excellent quality rate and product competitiveness.