The invention discloses a portable type visualized cardiophony teaching 
system, which is formed by a cardiac sound collection and transmission module, a 
microprocessor, an earphone and a touch screen, wherein the cardiac sound collection and transmission module comprises a cardiac sound sensor, a prepositioned sensor, a 50-Hz trap circuit, a high / low-pass filtering circuit, a main amplifying circuit and an A / D (Analogue / Digital) converter, which are connected in sequence; the 
microprocessor is respectively connected with a storing device, an LED (Light-Emitting 
Diode) lamp, a network card, a 
USB (Universal Serial 
Bus) interface and a power supply managing module; the 
microprocessor is internally provided with an 
operating system; the 
operating system comprises an onsite cardiac sound collection module, a case learning module, a learning effect testing module and a user managing module; and the onsite cardiac sound collection module comprises a cardiac sound collection sub-module, a cardiac sound analyzing sub-module, an authority judging sub-module and a cardiac sound storing sub-module. The 
system disclosed by the invention has the characteristics of small volume, convenience for carrying, and capability of representing different 
cardiac sounds to a user on two aspects of 
auditory sense and visual sense, can carry out onsite cardiac sound collection and learning effect test, and is convenient for being promoted and popularized in school teaching.